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Enhanced with UASP support (USB Attached SCSI Protocol), this USB 3.0 controller performs up to 70% faster than conventional USB 3.0 when paired with a UASP supported enclosure (Note: UASP requires a compatible operating system). Using a more efficient protocol than the traditional USB BOT (Bulk-Only Transport), UASP technology optimizes transfers by allowing multiple commands to be processed simultaneously, significantly increasing transfer speeds for less wait time on data transfers. See our UASP test results below for further details.

The card uses a "stacked" port layout that places the ports one on top of the other, enabling all four USB 3.0 ports to be external facing, while still allowing the card to fit into a small form factor/low profile computer system using the included low profile bracket.

Plus, with a built-in SATA power connector, each USB port can provide up to 900mA of power to devices that draw power from a host bus connection (500mA for USB 2.0) by connecting to your computer power supply.

The maximum throughput of this card is limited by the bus interface. If used with PCI Express Gen 1.0 enabled computers, the max throughput is 2.5 Gbps. If used with PCI Express Gen 2.0 enabled computers, the max throughput is 5 Gbps.

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How to

In Device Manager, under the appropriate heading, confirm that your expansion card is listed and that there isn't an exclamation mark next to it. For example, a USB controller card would be under Universal Serial Bus controllers.

Your expansion card is listed according to the name of the chipset. To determine the name of the chipset of your expansion card, navigate to www.StarTech.com and look on the Technical Specifications tab for your product.

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When you troubleshoot issues with a USB controller card, there are some quick tests that you can complete to rule out potential problems. You can test to make sure that the following components are working correctly and are not the source of the issue:

USB cables

USB devices

USB controller card

To test your setup components, try the following:

Use the USB cable, device, and controller card in another setup to see if the problem is with the components or the setup.

Use a different USB cable, device, and controller card in your setup to see if the problem persists. Ideally, you should test a component that you know works in another setup.

When you test your cables, it is recommended that you do the following:

Test each cable individually.

Use short cables when you are testing.

When you test the USB device and controller card, it is recommended that you do the following:

Press the Windows key + R, type devmgmt.msc, and press Enter to open Device Manager. Check to see if your device is listed under Universal Serial Bus controllers.

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You should not upgrade your device's firmware if you do not have any issues with the functionality of your device. The only time you should consider an upgrade is if you are experiencing a problem with the device, and you have confirmed that the firmware addresses this problem. You can confirm this is the case by reviewing the documentation included with the firmware or by consulting with our Technical Support team. Incorrectly upgrading firmware can result in diminished performance so it is best to contact StarTech.com if you would like to perform this operation.

Quality of Product

Tell us what you think of this product.

1 - 6 of 6 Reviews

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(5 stars)Great for updating an older PC

By: George on 06/01/2018

I've been running this card well over a year and beside having to reinstall the drivers once (power failure) this card has been flawless. My machine only has USB 2.0
ports so the speed upgrade was quite dramatic, I don't think you quite get the full 5gbps as advertised but my external USB drives do outperform my internal SATA II hard drives.

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(5 stars)Best for VR!

By: Talwyn on 12/30/2017

This card works brilliantly for my Oculus Rift (VR). It supports windows 10, but make sure you don't install the old drivers from this website. The new ones are automatically installed by windows 10, and are (at the time of my writing) driverversion 10.0.16299.125, dated 07.12.2017.
Make sure your motherboard has enough PCIe-lane bandwidth left for a for x4 card - as well as a x4 slot, of course. Some motherboards downgrade to x1-speed when other slots are taken. Doublecheck your motherboard manual! Also keep in mind to plug in power from your PSU, otherwise the card won't work as well.

CommentHelpful?Yes - 1No - 0Report

(1 star)Only runs high-speed (usb2) not super-speed (usb3)

By: Brian Knudsen on 03/07/2017

Test the card on server 2016, will not accept the drivers from OS or the cd, make a
firmware upgrade, the OS can now find a driver, only run USB 2.0.
Try to install the drivers from cd, the system accepted the drivers,
but only run usb 2.0
Have try a usb 3 pen and a usb 3 harddrive.

CommentHelpful?Yes - 3No - 5Report

(5 stars)Half Height - PCI Express Card Adapter

By: GrizGrover on 05/12/2015

I have been using the USB 3.0 PCIe card adapter for about 6 months and it installed easily and has worked flawlessly. The half height card bracket came with the kit and enabled me to use it in my ASUSPro Series system unit.

Quality of Product (5/5)

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(4 stars)great but only works sometimes

By: pandaman on 03/03/2015

I got it a year ago and it didn't work with my hp but I blame the mobo in that. It works on my main rig so it's still
functional as extra USB ports.

Quality of Product (4/5)

CommentHelpful?Yes - 0No - 0Report

(5 stars)Works perfectly with ProFlightSim instr. panels

By: PatM on 10/30/2014

The price was right, and it is small enough to fit in with my rather large GTX 780Ti graphics card. The Pro Flight Sim instrument panels require USB 3.0 ports; all eight work perfectly with two 4 port StarTech PCIe cards.